fix frontend build error

frontend/package-lock.json

@@ -2893,55 +2893,18 @@
             "dev": true
         },
         "autoprefixer": {
-            "version": "10.0.1",
+            "version": "9.8.6",
-            "resolved": "https://registry.npmjs.org/autoprefixer/-/autoprefixer-10.0.1.tgz",
+            "resolved": "https://registry.npmjs.org/autoprefixer/-/autoprefixer-9.8.6.tgz",
-            "integrity": "sha512-aQo2BDIsoOdemXUAOBpFv4ZQa2DrOtEufarYhtFsK1088Ca0TUwu/aQWf0M3mrILXZ3mTIVn1lR3hPW8acacsw==",
+            "integrity": "sha512-XrvP4VVHdRBCdX1S3WXVD8+RyG9qeb1D5Sn1DeLiG2xfSpzellk5k54xbUERJ3M5DggQxes39UGOTP8CFrEGbg==",
             "dev": true,
             "requires": {
-                "browserslist": "^4.14.5",
+                "browserslist": "^4.12.0",
-                "caniuse-lite": "^1.0.30001137",
+                "caniuse-lite": "^1.0.30001109",
                 "colorette": "^1.2.1",
                 "normalize-range": "^0.1.2",
                 "num2fraction": "^1.2.2",
+                "postcss": "^7.0.32",
                 "postcss-value-parser": "^4.1.0"
-            },
-            "dependencies": {
-                "browserslist": {
-                    "version": "4.14.5",
-                    "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.14.5.tgz",
-                    "integrity": "sha512-Z+vsCZIvCBvqLoYkBFTwEYH3v5MCQbsAjp50ERycpOjnPmolg1Gjy4+KaWWpm8QOJt9GHkhdqAl14NpCX73CWA==",
-                    "dev": true,
-                    "requires": {
-                        "caniuse-lite": "^1.0.30001135",
-                        "electron-to-chromium": "^1.3.571",
-                        "escalade": "^3.1.0",
-                        "node-releases": "^1.1.61"
-                    }
-                },
-                "caniuse-lite": {
-                    "version": "1.0.30001144",
-                    "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001144.tgz",
-                    "integrity": "sha512-4GQTEWNMnVZVOFG3BK0xvGeaDAtiPAbG2N8yuMXuXzx/c2Vd4XoMPO8+E918zeXn5IF0FRVtGShBfkfQea2wHQ==",
-                    "dev": true
-                },
-                "electron-to-chromium": {
-                    "version": "1.3.577",
-                    "resolved": "https://registry.npmjs.org/electron-to-chromium/-/electron-to-chromium-1.3.577.tgz",
-                    "integrity": "sha512-dSb64JQSFif/pD8mpVAgSFkbVi6YHbK6JeEziwNNmXlr/Ne2rZtseFK5SM7JoWSLf6gP0gVvRGi4/2ZRhSX/rA==",
-                    "dev": true
-                },
-                "escalade": {
-                    "version": "3.1.0",
-                    "resolved": "https://registry.npmjs.org/escalade/-/escalade-3.1.0.tgz",
-                    "integrity": "sha512-mAk+hPSO8fLDkhV7V0dXazH5pDc6MrjBTPyD3VeKzxnVFjH1MIxbCdqGZB9O8+EwWakZs3ZCbDS4IpRt79V1ig==",
-                    "dev": true
-                },
-                "node-releases": {
-                    "version": "1.1.61",
-                    "resolved": "https://registry.npmjs.org/node-releases/-/node-releases-1.1.61.tgz",
-                    "integrity": "sha512-DD5vebQLg8jLCOzwupn954fbIiZht05DAZs0k2u8NStSe6h9XdsuIQL8hSRKYiU8WUQRznmSDrKGbv3ObOmC7g==",
-                    "dev": true
-                }
             }
         },
         "aws-sign2": {

frontend/package.json

@@ -18,7 +18,7 @@
         "@types/react-router": "^5.1.8",
         "@types/react-router-dom": "^5.1.6",
         "@types/sass": "^1.16.0",
-        "autoprefixer": "^10.0.1",
+        "autoprefixer": "^9.8.6",
         "enzyme": "^3.11.0",
         "enzyme-adapter-react-16": "^1.15.5",
         "jest": "^26.5.2",

package.json

@@ -79,7 +79,7 @@
             "pre-push": "npm test && cd frontend && npm test"
         }
     },
-  "engines": {
+    "engines": {
-    "node": "14.x"
+        "node": "14.x"
-  }
+    }
 }