feat: optimize Dockerfile.gm and docker-compose for improved caching and integration testing

Author: randygrok

.github/integration-tests/docker-compose.yml

@@ -45,13 +45,7 @@ services:
 
   # GM chain (with rollkit)
   gm-chain:
-    build:
-      context: ../..
-      dockerfile: .github/integration-tests/docker/Dockerfile.gm
-      args:
-        IGNITE_VERSION: ${IGNITE_VERSION:-v29.3.1}
-        IGNITE_EVOLVE_APP_VERSION: ${IGNITE_EVOLVE_APP_VERSION:-main}
-        EVNODE_VERSION: ${EVNODE_VERSION:-v1.0.0-beta.2.0.20250908090838-0584153217ed}
+    image: gm-chain:latest
     container_name: gm-chain
     ports:
       - "26757:26757"  # RPC

.github/integration-tests/docker/Dockerfile.gm

@@ -3,41 +3,40 @@
 ##########
 FROM golang:1.24-bookworm AS builder
 
-ARG IGNITE_VERSION=latest
-ARG IGNITE_EVOLVE_APP_VERSION=main
-ARG EVNODE_VERSION=v1.0.0-beta.2
-
+# Install system dependencies - this layer will be cached
 RUN apt-get update && apt-get install -y --no-install-recommends \
     git curl bash ca-certificates make gcc musl-dev && \
     rm -rf /var/lib/apt/lists/*
 
-# Install Ignite CLI at requested version
+# Install Ignite CLI at requested version - cached if IGNITE_VERSION doesn't change
+ARG IGNITE_VERSION=latest
 RUN curl -sSL https://get.ignite.com/cli@${IGNITE_VERSION}! | bash
 
 WORKDIR /workspace
 
-# Copy ev-abci repo (root)
-COPY . /workspace/ev-abci
-
-# Scaffold GM app and apply evolve plugin
+# Scaffold GM app - cached if IGNITE_EVOLVE_APP_VERSION doesn't change
+ARG IGNITE_EVOLVE_APP_VERSION=main
 RUN ignite scaffold chain gm --no-module --skip-git --address-prefix gm
 WORKDIR /workspace/gm
 RUN ignite app install github.com/ignite/apps/evolve@${IGNITE_EVOLVE_APP_VERSION}
 RUN ignite evolve add
 
+# Copy ev-abci repo after scaffolding to avoid cache invalidation on code changes
+COPY . /workspace/ev-abci
+
 # Inject App wiring for ev-abci network module before building
 COPY .github/integration-tests/patches/app-wiring/patch-app-wiring.sh /workspace/patch-app-wiring.sh
 RUN chmod +x /workspace/patch-app-wiring.sh && \
     echo "===== Running network module patch =====" && \
     bash /workspace/patch-app-wiring.sh
 
-
-# Align module versions like in CI
+# Align module versions like in CI - cached if EVNODE_VERSION doesn't change
+ARG EVNODE_VERSION=v1.0.0-beta.2
 RUN go mod edit -replace github.com/evstack/ev-node=github.com/evstack/ev-node@${EVNODE_VERSION} \
     && go mod edit -replace github.com/evstack/ev-abci=../ev-abci \
     && go mod tidy
 
-# Build gmd binary
+# Build gmd binary - this will rebuild if source code changes
 ENV GOBIN=/workspace/bin
 RUN ignite chain build --skip-proto && \
     test -x "${GOBIN}/gmd"

.github/workflows/attester-mode-integration-test.yml

@@ -40,6 +40,20 @@ jobs:
           cache-from: type=gha,scope=local-da
           cache-to: type=gha,mode=max,scope=local-da
 
+      - name: Build and cache gm-chain image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: .github/integration-tests/docker/Dockerfile.gm
+          tags: gm-chain:latest
+          load: true
+          build-args: |
+            IGNITE_VERSION=${{ env.IGNITE_VERSION }}
+            IGNITE_EVOLVE_APP_VERSION=${{ env.IGNITE_EVOLVE_APP_VERSION }}
+            EVNODE_VERSION=${{ env.EVNODE_VERSION }}
+          cache-from: type=gha,scope=gm-chain
+          cache-to: type=gha,mode=max,scope=gm-chain
+
       - name: Run integration tests (compose orchestrator)
         env:
           VERBOSE: "true"