Fix dockerfile and improve linter and formatter

Fix wrong path in dockerfile.
Add `scss` file extension to "lint-staged" config so that prettier is
used to format `scss` files.
Set `eqeqeq` eslint rule severity to "error". Change all `==` instances in
old server code to `===`

Change-Id: Id0694f37556addc1c0cc05bc19e4e1fd1bd3411b
diff --git a/Dockerfile b/Dockerfile
index a1fde74..40d78d9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -16,7 +16,7 @@
 COPY client/package*.json client/
 COPY server/package*.json server/
 COPY common common
-COPY server/misc server/misc
+COPY server/scripts server/scripts
 COPY tsconfig.json ./
 
 RUN npm ci