Faster image builds with caching (#4491)

* fix makefile variable

* add branch for testing

* fix arm32 build

* use amd64 for web build

* install wheels in a separate layer for better parallel builds

* try build-push-action

* try using gh context

* use short sha

* cleanup

Dockerfile

@@ -41,6 +41,7 @@ RUN --mount=type=bind,source=docker/install_s6_overlay.sh,target=/deps/install_s
 
 FROM base AS wheels
 ARG DEBIAN_FRONTEND
+ARG TARGETARCH
 
 # Use a separate container to build wheels to prevent build dependencies in final image
 RUN apt-get -qq update \
@@ -106,9 +107,11 @@ ENV PATH="/usr/lib/btbn-ffmpeg/bin:/usr/local/go2rtc/bin:/usr/local/nginx/sbin:$
 
 # Install dependencies
 RUN --mount=type=bind,source=docker/install_deps.sh,target=/deps/install_deps.sh \
-    --mount=type=bind,from=wheels,source=/wheels,target=/deps/wheels \
     /deps/install_deps.sh
 
+RUN --mount=type=bind,from=wheels,source=/wheels,target=/deps/wheels \
+    pip3 install -U /deps/wheels/*.whl
+
 COPY --from=deps-rootfs / /
 
 EXPOSE 5000
@@ -118,8 +121,8 @@ EXPOSE 8555
 
 ENTRYPOINT ["/init"]
 
-# Frigate deps with Node.js and NPM
-FROM deps AS deps-node
+# Frigate deps with Node.js and NPM for devcontainer
+FROM deps AS devcontainer
 
 # Install Node 16
 RUN apt-get update \
@@ -129,9 +132,6 @@ RUN apt-get update \
     && rm -rf /var/lib/apt/lists/* \
     && npm install -g npm@9
 
-# Devcontainer
-FROM deps-node AS devcontainer
-
 WORKDIR /workspace/frigate
 
 RUN apt-get update \
@@ -145,7 +145,8 @@ CMD ["sleep", "infinity"]
 
 
 # Frigate web build
-FROM deps-node AS web-build
+# force this to run on amd64 because QEMU is painfully slow
+FROM --platform=linux/amd64 node:16 AS web-build
 
 WORKDIR /work
 COPY web/package.json web/package-lock.json ./
@@ -154,19 +155,13 @@ RUN npm install
 COPY web/ ./
 RUN npm run build
 
-# Frigate web dist files
-FROM scratch AS web-dist
-
-COPY --from=web-build /work/dist/ /
-
 # Collect final files in a single layer
 FROM scratch AS rootfs
 
 WORKDIR /opt/frigate/
 COPY frigate frigate/
 COPY migrations migrations/
-COPY --from=web-dist / web/
-
+COPY --from=web-build /work/dist/ web/
 
 # Frigate final container
 FROM deps