fix(config.yml):error computing cache key and CircleCI received exit code 127

I resolved these issues:
-error Command failed with exit code 127
-error computing cache key: template: cacheKey unexpected unclosed action in command

.circleci/config.yml

@@ -15,7 +15,7 @@ workflows:
 jobs:
     build:
         docker:
-            - image: cimg/node:14.10.1
+            - image: cimg/node:12.18
         steps:
             - checkout
             - restore_cache:
@@ -31,7 +31,7 @@ jobs:
                     - ./node_modules
     lint:
         docker:
-            - image: cimg/node:14.10.1
+            - image: cimg/node:12.18
         steps:
             - checkout
             - restore_cache:
@@ -42,7 +42,7 @@ jobs:
                 command: yarn lint && yarn format:check
     test:
         docker:
-            - image: cimg/node:14.10.1
+            - image: cimg/node:12.18
         steps:
             - checkout
             - restore_cache:
@@ -53,13 +53,13 @@ jobs:
                 command: yarn test:ci
     e2e-test:
         docker:
-        - image: cimg/node:14.10.1
+            - image: cimg/node:12.18
                 environment: 
-            DATABASE_URL: postgresql://jordan:mot_de_passe@localhost:5432/psdb
-            JWT_SECRET: mot_de_passe
+                DATABASE_URL: "postgres://jordan:mot_de_passe@localhost:5432/psdb"
                 API_PORT: 3000
                 API_HOST: localhost
                 API_PROTOCOL: http
+                JWT_SECRET: mot_de_passe
             - image: circleci/postgres:9.6.2-alpine
                 environment:
                 POSTGRES_USER: jordan
@@ -68,8 +68,7 @@ jobs:
         steps: 
             - checkout
             - restore_cache:
-                name: Restore Yarn Package Cache
-                keys: yarn-packages-v2{{ checksum "yarn.lock" }}
+                key: yarn-packages-v2{{ checksum "yarn.lock" }}
             - run: 
                 name: "E2e Test"
                 command: yarn test:e2e