build(docker): refactor Dockerfile to enable caching of node_modules (#1550)

* ci: revert actions/cache version change and install GNU tar

* ci: do not potentially destroy Docker cache while building preview images

* build(docker): refactor Dockerfile to cache node_modules

* ci: remove Next.js caching

* build(docker): don't break arm builds

.github/workflows/preview.yml

@@ -19,13 +19,6 @@ jobs:
         uses: docker/setup-qemu-action@v1
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v1
-      - name: Cache Docker layers
-        uses: actions/cache@v2.1.5
-        with:
-          path: /tmp/.buildx-cache
-          key: ${{ runner.os }}-buildx-${{ github.sha }}
-          restore-keys: |
-            ${{ runner.os }}-buildx-
       - name: Log in to Docker Hub
         uses: docker/login-action@v1
         with:
@@ -49,12 +42,3 @@ jobs:
           tags: |
             sctx/overseerr:${{ steps.get_version.outputs.VERSION }}
             ghcr.io/sct/overseerr:${{ steps.get_version.outputs.VERSION }}
-          cache-from: type=local,src=/tmp/.buildx-cache
-          cache-to: type=local,dest=/tmp/.buildx-cache-new
-      - # Temporary fix
-        # https://github.com/docker/build-push-action/issues/252
-        # https://github.com/moby/buildkit/issues/1896
-        name: Move cache
-        run: |
-          rm -rf /tmp/.buildx-cache
-          mv /tmp/.buildx-cache-new /tmp/.buildx-cache