correct erroneous comment and merged 2 copies

Author: Guiorgy

Dockerfile

@@ -31,11 +31,8 @@ RUN apk add --no-cache \
     yarn \
     zlib-dev
 
-COPY .git /pgadmin4/.git
-# Create the /pgadmin4 directory and copy the source into it. Explicitly
-# remove the node_modules directory as we'll recreate a clean version, as well
-# as various other files we don't want
-COPY web /pgadmin4/web
+# Create the /pgadmin4 directory and copy the source into it
+COPY .git web /pgadmin4/
 
 WORKDIR /pgadmin4/web