diff --git a/back-end/yarn.lock b/back-end/yarn.lock
index 61a2e77..f7cbbc0 100644
--- a/back-end/yarn.lock
+++ b/back-end/yarn.lock
@@ -1729,7 +1729,7 @@ bluebird@^2.9.30:
   resolved "https://registry.yarnpkg.com/bluebird/-/bluebird-2.11.0.tgz#534b9033c022c9579c56ba3b3e5a5caafbb650e1"
   integrity sha1-U0uQM8AiyVecVro7Plpcqvu2UOE=
 
-bluebird@^3.4.3, bluebird@^3.5.0, bluebird@^3.5.4, bluebird@^3.5.5, bluebird@^3.7.0, bluebird@^3.7.1:
+bluebird@^3.4.3, bluebird@^3.5.0, bluebird@^3.5.4, bluebird@^3.5.5, bluebird@^3.7.0:
   version "3.7.1"
   resolved "https://registry.yarnpkg.com/bluebird/-/bluebird-3.7.1.tgz#df70e302b471d7473489acf26a93d63b53f874de"
   integrity sha512-DdmyoGCleJnkbp3nkbxTLJ18rjDsE4yCggEwKNXkeV123sPNfOCYeDoeuOY+F2FrSjO1YXcTU+dsy96KMy+gcg==
@@ -2384,6 +2384,11 @@ colorette@1.1.0:
   resolved "https://registry.yarnpkg.com/colorette/-/colorette-1.1.0.tgz#1f943e5a357fac10b4e0f5aaef3b14cdc1af6ec7"
   integrity sha512-6S062WDQUXi6hOfkO/sBPVwE5ASXY4G2+b4atvhJfSsuUUhIaUKlkjLe9692Ipyt5/a+IPF5aVTu3V5gvXq5cg==
 
+colorette@2.0.19:
+  version "2.0.19"
+  resolved "https://registry.yarnpkg.com/colorette/-/colorette-2.0.19.tgz#cdf044f47ad41a0f4b56b3a0d5b4e6e1a2d5a798"
+  integrity sha512-3tlv/dIP7FWvj3BsbHrGLJ6l/oKh1O3TcgBqMn+yyCagOxc23fyzDS6HypQbgxWbkpDnf52p1LuR4eWDQ/K9WQ==
+
 colors@^1.1.2:
   version "1.4.0"
   resolved "https://registry.yarnpkg.com/colors/-/colors-1.4.0.tgz#c50491479d4c1bdaed2c9ced32cf7c7dc2360f78"
@@ -2411,6 +2416,11 @@ commander@^3.0.2:
   resolved "https://registry.yarnpkg.com/commander/-/commander-3.0.2.tgz#6837c3fb677ad9933d1cfba42dd14d5117d6b39e"
   integrity sha512-Gar0ASD4BDyKC4hl4DwHqDrmvjoxWKZigVnAbn5H1owvm4CxCPdb0HQDehwNYMJpla5+M2tPmPARzhtYuwpHow==
 
+commander@^9.1.0:
+  version "9.5.0"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-9.5.0.tgz#bc08d1eb5cedf7ccb797a96199d41c7bc3e60d30"
+  integrity sha512-KRs7WVDKg86PWiuAqhDrAQnTXZKraVcCc6vFdL14qrZ/DcWwuRo7VoiYXalXO7S5GKpqYiVEwCbgFDfxNHKJBQ==
+
 commander@~2.19.0:
   version "2.19.0"
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.19.0.tgz#f6198aa84e5b83c46054b94ddedbfed5ee9ff12a"
@@ -2868,12 +2878,12 @@ date-now@^0.1.4:
   resolved "https://registry.yarnpkg.com/date-now/-/date-now-0.1.4.tgz#eaf439fd4d4848ad74e5cc7dbef200672b9e345b"
   integrity sha1-6vQ5/U1ISK105cx9vvIAZyueNFs=
 
-debug@*, debug@4.1.1, debug@^4.1.0, debug@^4.1.1:
-  version "4.1.1"
-  resolved "https://registry.yarnpkg.com/debug/-/debug-4.1.1.tgz#3b72260255109c6b589cee050f1d516139664791"
-  integrity sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==
+debug@*, debug@4.3.4, debug@^4.1.0, debug@^4.1.1:
+  version "4.3.4"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-4.3.4.tgz#1319f6579357f2338d3337d2cdd4914bb5dcc865"
+  integrity sha512-PRWFHuSU3eDtQJPvnNY7Jcket1j0t5OuOsFzPPzsekD52Zl8qUfFIPEiswXqIvHWGVHOgX+7G/vCNNhehwxfkQ==
   dependencies:
-    ms "^2.1.1"
+    ms "2.1.2"
 
 debug@2.6.9, debug@^2.2.0, debug@^2.3.3:
   version "2.6.9"
@@ -2896,6 +2906,13 @@ debug@4.1.0:
   dependencies:
     ms "^2.1.1"
 
+debug@4.1.1:
+  version "4.1.1"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-4.1.1.tgz#3b72260255109c6b589cee050f1d516139664791"
+  integrity sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==
+  dependencies:
+    ms "^2.1.1"
+
 debug@^3.0.0, debug@^3.1.0, debug@^3.1.1, debug@^3.2.5, debug@^3.2.6:
   version "3.2.6"
   resolved "https://registry.yarnpkg.com/debug/-/debug-3.2.6.tgz#e83d17de16d8a7efb7717edbe5fb10135eee629b"
@@ -3477,6 +3494,11 @@ es6-templates@^0.2.3:
     recast "~0.11.12"
     through "~2.3.6"
 
+escalade@^3.1.1:
+  version "3.1.1"
+  resolved "https://registry.yarnpkg.com/escalade/-/escalade-3.1.1.tgz#d8cfdc7000965c5a0174b4a82eaa5c0552742e40"
+  integrity sha512-k0er2gUkLf8O0zKJiAhmkTnJlTvINGv7ygDNPbeIsX/TJjGJZHuh9B2UxbsaEkmlEo9MfhrSzmhIlhRlI2GXnw==
+
 escape-html@^1.0.3, escape-html@~1.0.3:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/escape-html/-/escape-html-1.0.3.tgz#0258eae4d3d0c0974de1c169188ef0051d1d1988"
@@ -3495,6 +3517,11 @@ eslint-scope@^4.0.3:
     esrecurse "^4.1.0"
     estraverse "^4.1.1"
 
+esm@^3.2.25:
+  version "3.2.25"
+  resolved "https://registry.yarnpkg.com/esm/-/esm-3.2.25.tgz#342c18c29d56157688ba5ce31f8431fbb795cc10"
+  integrity sha512-U1suiZ2oDVWv4zPO56S0NcR5QriEahGtdN2OR6FiOG4WJvcjBVFB0qI4+eKoWFH483PKGuLuu6V8Z4T5g63UVA==
+
 esprima@^4.0.0:
   version "4.0.1"
   resolved "https://registry.yarnpkg.com/esprima/-/esprima-4.0.1.tgz#13b04cdb3e6c5d19df91ab6987a8695619b0aa71"
@@ -4196,6 +4223,11 @@ get-caller-file@^2.0.1:
   resolved "https://registry.yarnpkg.com/get-caller-file/-/get-caller-file-2.0.5.tgz#4f94412a82db32f36e3b0b9741f8a97feb031f7e"
   integrity sha512-DyFP3BM/3YHTQOCUL/w0OZHR0lpKeGrxotcHWcqNEdnltqFwXVfhEBQ94eIo34AfQpo0rGki4cyIiftY06h2Fg==
 
+get-package-type@^0.1.0:
+  version "0.1.0"
+  resolved "https://registry.yarnpkg.com/get-package-type/-/get-package-type-0.1.0.tgz#8de2d803cff44df3bc6c456e6668b36c3926e11a"
+  integrity sha512-pjzuKtY64GYfWizNAJ0fr9VqttZkNiK2iS430LtIHzjBEr6bX8Am2zm4sW4Ro5wjWW5cAlRL1qAMTcXbjNAO2Q==
+
 get-proxy@^2.0.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/get-proxy/-/get-proxy-2.1.0.tgz#349f2b4d91d44c4d4d4e9cba2ad90143fac5ef93"
@@ -4243,6 +4275,11 @@ getopts@2.2.5:
   resolved "https://registry.yarnpkg.com/getopts/-/getopts-2.2.5.tgz#67a0fe471cacb9c687d817cab6450b96dde8313b"
   integrity sha512-9jb7AW5p3in+IiJWhQiZmmwkpLaR/ccTWdWQCtZM66HJcHHLegowh4q4tSD7gouUyeNvFWRavfK9GXosQHDpFA==
 
+getopts@2.3.0:
+  version "2.3.0"
+  resolved "https://registry.yarnpkg.com/getopts/-/getopts-2.3.0.tgz#71e5593284807e03e2427449d4f6712a268666f4"
+  integrity sha512-5eDf9fuSXwxBL6q5HX+dhDj+dslFGWzU5thZ9kNKUkcPtaPdatmUFKwHFrLb/uf/WpA4BHET+AX3Scl56cAjpA==
+
 getpass@^0.1.1:
   version "0.1.7"
   resolved "https://registry.yarnpkg.com/getpass/-/getpass-0.1.7.tgz#5eff8e3e684d569ae4cb2b1282604e8ba62149fa"
@@ -5034,6 +5071,11 @@ interpret@1.2.0, interpret@^1.0.0, interpret@^1.2.0:
   resolved "https://registry.yarnpkg.com/interpret/-/interpret-1.2.0.tgz#d5061a6224be58e8083985f5014d844359576296"
   integrity sha512-mT34yGKMNceBQUoVn7iCDKDntA7SC6gycMAWzGx1z/CMCTV7b2AAtXlo3nRyHZ1FelRkQbQjprHSYGwzLtkVbw==
 
+interpret@^2.2.0:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/interpret/-/interpret-2.2.0.tgz#1a78a0b5965c40a5416d007ad6f50ad27c417df9"
+  integrity sha512-Ju0Bz/cEia55xDwUWEa8+olFpCiQoypjnQySseKtmjNrnps3P+xfpUmGr90T7yjlVJmOtybRvPXhKMbHr+fWnw==
+
 intl-format-cache@^2.0.5:
   version "2.2.9"
   resolved "https://registry.yarnpkg.com/intl-format-cache/-/intl-format-cache-2.2.9.tgz#fb560de20c549cda20b569cf1ffb6dc62b5b93b4"
@@ -5179,6 +5221,13 @@ is-class-hotfix@~0.0.6:
   resolved "https://registry.yarnpkg.com/is-class-hotfix/-/is-class-hotfix-0.0.6.tgz#a527d31fb23279281dde5f385c77b5de70a72435"
   integrity sha512-0n+pzCC6ICtVr/WXnN2f03TK/3BfXY7me4cjCAqT8TYXEl0+JBRoqBo94JJHXcyDSLUeWbNX8Fvy5g5RJdAstQ==
 
+is-core-module@^2.9.0:
+  version "2.11.0"
+  resolved "https://registry.yarnpkg.com/is-core-module/-/is-core-module-2.11.0.tgz#ad4cb3e3863e814523c96f3f58d26cc570ff0144"
+  integrity sha512-RRjxlvLDkD1YJwDbroBHMb+cukurkDWNyHx7D3oNB5x9rb5ogcksMC5wHCadcXoo67gVr/+3GFySh3134zi6rw==
+  dependencies:
+    has "^1.0.3"
+
 is-cwebp-readable@^2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/is-cwebp-readable/-/is-cwebp-readable-2.0.1.tgz#afb93b0c0abd0a25101016ae33aea8aedf926d26"
@@ -5760,25 +5809,24 @@ knex@^0.19.0:
     v8flags "^3.1.3"
 
 knex@latest:
-  version "0.20.0"
-  resolved "https://registry.yarnpkg.com/knex/-/knex-0.20.0.tgz#f1c83718ab60da2fc81ff00de1dd4616400564dd"
-  integrity sha512-2IQUDItwSAuhTxtH/T4VibEuFMngI9LUkpgM0qD/JH1xWARRtWIJ9mU8hNNnFgrKh9RZdPYZToBgsV/UEaje4g==
-  dependencies:
-    bluebird "^3.7.1"
-    colorette "1.1.0"
-    commander "^3.0.2"
-    debug "4.1.1"
-    getopts "2.2.5"
-    inherits "~2.0.4"
-    interpret "^1.2.0"
-    liftoff "3.1.0"
-    lodash "^4.17.15"
-    mkdirp "^0.5.1"
-    pg-connection-string "2.1.0"
-    tarn "^2.0.0"
+  version "2.4.0"
+  resolved "https://registry.yarnpkg.com/knex/-/knex-2.4.0.tgz#7d33cc36f320cdac98741010544b4c6a98b8b19e"
+  integrity sha512-i0GWwqYp1Hs2yvc2rlDO6nzzkLhwdyOZKRdsMTB8ZxOs2IXQyL5rBjSbS1krowCh6V65T4X9CJaKtuIfkaPGSA==
+  dependencies:
+    colorette "2.0.19"
+    commander "^9.1.0"
+    debug "4.3.4"
+    escalade "^3.1.1"
+    esm "^3.2.25"
+    get-package-type "^0.1.0"
+    getopts "2.3.0"
+    interpret "^2.2.0"
+    lodash "^4.17.21"
+    pg-connection-string "2.5.0"
+    rechoir "^0.8.0"
+    resolve-from "^5.0.0"
+    tarn "^3.0.2"
     tildify "2.0.0"
-    uuid "^3.3.3"
-    v8flags "^3.1.3"
 
 koa-body@^4.1.0:
   version "4.1.1"
@@ -6121,10 +6169,10 @@ lodash.tonumber@^4.0.3:
   resolved "https://registry.yarnpkg.com/lodash.tonumber/-/lodash.tonumber-4.0.3.tgz#0b96b31b35672793eb7f5a63ee791f1b9e9025d9"
   integrity sha1-C5azGzVnJ5Prf1pj7nkfG56QJdk=
 
-lodash@^4.1.1, lodash@^4.17.10, lodash@^4.17.11, lodash@^4.17.12, lodash@^4.17.13, lodash@^4.17.14, lodash@^4.17.15, lodash@^4.17.3, lodash@^4.17.4, lodash@^4.17.5:
-  version "4.17.15"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.15.tgz#b447f6670a0455bbfeedd11392eff330ea097548"
-  integrity sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A==
+lodash@^4.1.1, lodash@^4.17.10, lodash@^4.17.11, lodash@^4.17.12, lodash@^4.17.13, lodash@^4.17.14, lodash@^4.17.15, lodash@^4.17.21, lodash@^4.17.3, lodash@^4.17.4, lodash@^4.17.5:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
+  integrity sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==
 
 log-symbols@^2.2.0:
   version "2.2.0"
@@ -7412,6 +7460,11 @@ path-parse@^1.0.6:
   resolved "https://registry.yarnpkg.com/path-parse/-/path-parse-1.0.6.tgz#d62dbb5679405d72c4737ec58600e9ddcf06d24c"
   integrity sha512-GSmOT2EbHrINBf9SR7CDELwlJ8AENk3Qn7OikK4nFYAu3Ote2+JYNVvkpAEQm3/TLNEJFD/xZJjzyxg3KBWOzw==
 
+path-parse@^1.0.7:
+  version "1.0.7"
+  resolved "https://registry.yarnpkg.com/path-parse/-/path-parse-1.0.7.tgz#fbc114b60ca42b30d9daf5858e4bd68bbedb6735"
+  integrity sha512-LDJzPVEEEPR+y48z93A0Ed0yXb8pAByGWo/k5YYdYgpY2/2EsOsksJrq7lOHxryrVOn1ejG6oAp8ahvOIQD8sw==
+
 path-root-regex@^0.1.0:
   version "0.1.2"
   resolved "https://registry.yarnpkg.com/path-root-regex/-/path-root-regex-0.1.2.tgz#bfccdc8df5b12dc52c8b43ec38d18d72c04ba96d"
@@ -7476,6 +7529,11 @@ pg-connection-string@2.1.0:
   resolved "https://registry.yarnpkg.com/pg-connection-string/-/pg-connection-string-2.1.0.tgz#e07258f280476540b24818ebb5dca29e101ca502"
   integrity sha512-bhlV7Eq09JrRIvo1eKngpwuqKtJnNhZdpdOlvrPrA4dxqXPjxSrbNrfnIDmTpwMyRszrcV4kU5ZA4mMsQUrjdg==
 
+pg-connection-string@2.5.0:
+  version "2.5.0"
+  resolved "https://registry.yarnpkg.com/pg-connection-string/-/pg-connection-string-2.5.0.tgz#538cadd0f7e603fc09a12590f3b8a452c2c0cf34"
+  integrity sha512-r5o/V/ORTA6TmUnyWZR9nCj1klXCO2CEKNRlVuJptZe85QuhFayC7WeMic7ndayT5IRIR0S0xFxFi2ousartlQ==
+
 picomatch@^2.0.4:
   version "2.0.7"
   resolved "https://registry.yarnpkg.com/picomatch/-/picomatch-2.0.7.tgz#514169d8c7cd0bdbeecc8a2609e34a7163de69f6"
@@ -8322,6 +8380,13 @@ rechoir@^0.6.2:
   dependencies:
     resolve "^1.1.6"
 
+rechoir@^0.8.0:
+  version "0.8.0"
+  resolved "https://registry.yarnpkg.com/rechoir/-/rechoir-0.8.0.tgz#49f866e0d32146142da3ad8f0eff352b3215ff22"
+  integrity sha512-/vxpCXddiX8NGfGO/mTafwjq4aFa/71pvamip0++IQk3zG8cbCj0fifNPrjjF1XMXUne91jL9OoxmdykoEtifQ==
+  dependencies:
+    resolve "^1.20.0"
+
 redent@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/redent/-/redent-1.0.0.tgz#cf916ab1fd5f1f16dfb20822dd6ec7f730c2afde"
@@ -8656,6 +8721,15 @@ resolve@^1.1.6, resolve@^1.1.7, resolve@^1.10.0, resolve@^1.3.2, resolve@^1.8.1:
   dependencies:
     path-parse "^1.0.6"
 
+resolve@^1.20.0:
+  version "1.22.1"
+  resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.22.1.tgz#27cb2ebb53f91abb49470a928bba7558066ac177"
+  integrity sha512-nBpuuYuY5jFsli/JIs1oldw6fOQCBioohqWZg/2hiaOybXOft4lonv85uDOKXdf8rhyK159cxU5cDcK/NKk8zw==
+  dependencies:
+    is-core-module "^2.9.0"
+    path-parse "^1.0.7"
+    supports-preserve-symlinks-flag "^1.0.0"
+
 responselike@1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/responselike/-/responselike-1.0.2.tgz#918720ef3b631c5642be068f15ade5a46f4ba1e7"
@@ -9888,6 +9962,11 @@ supports-color@^5.3.0, supports-color@^5.5.0:
   dependencies:
     has-flag "^3.0.0"
 
+supports-preserve-symlinks-flag@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/supports-preserve-symlinks-flag/-/supports-preserve-symlinks-flag-1.0.0.tgz#6eda4bd344a3c94aea376d4cc31bc77311039e09"
+  integrity sha512-ot0WnXS9fgdkgIcePe6RHNk1WA8+muPa6cSjeR3V8K27q9BB1rTE3R1p7Hv0z1ZyAc8s6Vvv8DIyWf681MAt0w==
+
 svgo@^1.0.5:
   version "1.3.0"
   resolved "https://registry.yarnpkg.com/svgo/-/svgo-1.3.0.tgz#bae51ba95ded9a33a36b7c46ce9c359ae9154313"
@@ -9965,6 +10044,11 @@ tarn@^2.0.0:
   resolved "https://registry.yarnpkg.com/tarn/-/tarn-2.0.0.tgz#c68499f69881f99ae955b4317ca7d212d942fdee"
   integrity sha512-7rNMCZd3s9bhQh47ksAQd92ADFcJUjjbyOvyFjNLwTPpGieFHMC84S+LOzw0fx1uh6hnDz/19r8CPMnIjJlMMA==
 
+tarn@^3.0.2:
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/tarn/-/tarn-3.0.2.tgz#73b6140fbb881b71559c4f8bfde3d9a4b3d27693"
+  integrity sha512-51LAVKUSZSVfI05vjPESNc5vwqqZpbXCsU+/+wxlOrUjk2SnFTt97v9ZgQrD4YmxYW1Px6w2KjaDitCfkvgxMQ==
+
 temp-dir@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/temp-dir/-/temp-dir-1.0.0.tgz#0a7c0ea26d3a39afa7e0ebea9c1fc0bc4daa011d"