ci: Add docker and build rules for prover-autoscaler (#3069)

## What ❔

Add Dockerfile and build rules for prover-autoscaler.
<!-- What are the changes this PR brings about? -->
<!-- Example: This PR adds a PR template to the repo. -->
<!-- (For bigger PRs adding more context is appreciated) -->

## Why ❔

To build prover-autoscaler image.
<!-- Why are these changes done? What goal do they contribute to? What
are the principles behind them? -->
<!-- Example: PR templates ensure PR reviewers, observers, and future
iterators are in context about the evolution of repos. -->

## Checklist

<!-- Check your PR fulfills the following items. -->
<!-- For draft PRs check the boxes as you complete them. -->

- [x] PR title corresponds to the body of PR (we generate changelog
entries from PRs).
- [ ] Tests for the changes have been added / updated.
- [ ] Documentation comments have been added / updated.
- [x] Code has been formatted via `zk_supervisor fmt` and `zk_supervisor
lint`.

.github/workflows/new-build-prover-template.yml

@@ -40,7 +40,7 @@ on:
 jobs:
   get-protocol-version:
     name: Get protocol version
-    runs-on: [ matterlabs-ci-runner-high-performance ]
+    runs-on: [matterlabs-ci-runner-high-performance]
     outputs:
       protocol_version: ${{ steps.protocolversion.outputs.protocol_version }}
     steps:
@@ -86,7 +86,7 @@ jobs:
     needs: get-protocol-version
     env:
       PROTOCOL_VERSION: ${{ needs.get-protocol-version.outputs.protocol_version }}
-    runs-on: [ matterlabs-ci-runner-high-performance ]
+    runs-on: [matterlabs-ci-runner-high-performance]
     strategy:
       matrix:
         components:
@@ -96,6 +96,7 @@ jobs:
           - prover-fri-gateway
           - prover-job-monitor
           - proof-fri-gpu-compressor
+          - prover-autoscaler
     steps:
       - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
         with:
@@ -166,7 +167,7 @@ jobs:
 
   copy-images:
     name: Copy images between docker registries
-    needs: [ build-images, get-protocol-version ]
+    needs: [build-images, get-protocol-version]
     env:
       PROTOCOL_VERSION: ${{ needs.get-protocol-version.outputs.protocol_version }}
     runs-on: matterlabs-ci-runner

docker/prover-autoscaler/Dockerfile

@@ -0,0 +1,25 @@
+FROM ghcr.io/matter-labs/zksync-build-base:latest AS builder
+
+ARG DEBIAN_FRONTEND=noninteractive
+
+# set of args for use of sccache
+ARG SCCACHE_GCS_BUCKET=""
+ARG SCCACHE_GCS_SERVICE_ACCOUNT=""
+ARG SCCACHE_GCS_RW_MODE=""
+ARG RUSTC_WRAPPER=""
+
+ENV SCCACHE_GCS_BUCKET=${SCCACHE_GCS_BUCKET}
+ENV SCCACHE_GCS_SERVICE_ACCOUNT=${SCCACHE_GCS_SERVICE_ACCOUNT}
+ENV SCCACHE_GCS_RW_MODE=${SCCACHE_GCS_RW_MODE}
+ENV RUSTC_WRAPPER=${RUSTC_WRAPPER}
+
+WORKDIR /usr/src/zksync
+COPY . .
+
+RUN cd prover && cargo build --release --bin zksync_prover_autoscaler
+
+FROM ghcr.io/matter-labs/zksync-runtime-base:latest
+
+COPY --from=builder /usr/src/zksync/prover/target/release/zksync_prover_autoscaler /usr/bin/
+
+ENTRYPOINT ["/usr/bin/zksync_prover_autoscaler"]