use parity docker image for devnet release

.github/workflows/devnet-release.yml

@@ -3,23 +3,19 @@ name: "Devnet Community Release"
 on:
   push:
     branches:
-      - main
+      - parity-ci-devnet
+
+env:
+  USER: ci
 
 jobs:
   deploy-devnet:
-    runs-on:
-      - ubuntu-latest
+    runs-on: ubuntu-latest
+    container: paritytech/ci-linux:production
     concurrency:
       group: deploy-devnet
       cancel-in-progress: false
     steps:
-    - name: Clean up
-      continue-on-error: true
-      run: |
-        sudo chown -R $USER:$USER $GITHUB_WORKSPACE
-        docker system prune --force --all --volumes
-
-
     - uses: actions/checkout@v2
 
     - uses: google-github-actions/setup-gcloud@master
@@ -29,6 +25,10 @@ jobs:
 
     - uses: actions/setup-python@v2
 
+    - name: Setup nix dirs
+      run: |
+        mkdir -m 0755 /nix && chown ci /nix
+
     - uses: cachix/install-nix-action@v16
       with:
         nix_path: nixpkgs=channel:nixos-unstable
@@ -45,7 +45,7 @@ jobs:
 
     - name: Push artifact
       run: |
-        /home/runner/.cargo/bin/cargo build --release
+        cargo build --release
         tar -czvf composable-picasso-${{ env.RELEASE_VERSION }}.tar.gz target/release/composable
         gsutil mv *.tar.gz gs://composable-binaries/community-releases/picasso/