Deploy to app (#2728)

# Motivation
The action that deploys to an app subnet works but is slow and not
ergonomic.

# Changes
- Use a larger runner to build faster
- Improve the markdown, although it would be nice it it were not all
bold.

# Tests
See the CI runs. [A sample
run:](https://github.com/dfinity/nns-dapp/actions/runs/5326744006)
![Screenshot from 2023-06-20
21-49-13](https://github.com/dfinity/nns-dapp/assets/5982633/4a29b6ca-4c1b-489a-8362-eec14b36f190)

---------

Co-authored-by: Max Murphy-Skvorzov <max@winning.black>
Co-authored-by: David Dal Busco <david.dalbusco@dfinity.org>

.github/workflows/deploy-to-app.yaml

@@ -31,7 +31,7 @@ concurrency:
   cancel-in-progress: true
 jobs:
   deploy-app:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest-m
     timeout-minutes: 60
     env:
       NNS_DAPP_APP_SUBNET_CANISTER_ID: "xnjld-hqaaa-aaaal-qb56q-cai"
@@ -103,12 +103,17 @@ jobs:
           dfx canister install --mode "${{ inputs.mode || 'upgrade' }}" --yes --network "$DFX_NETWORK" "$CANISTER_NAME" --wasm out/sns_aggregator.wasm
       - name: Canister info
         run: |
+          # How to add a github summary: https://docs.github.com/en/actions/using-workflows/workflow-commands-for-github-actions#example-of-adding-a-job-summary
+          set -x
           for canister in nns-dapp sns_aggregator ; do
-             echo "========================================"
-             printf "== % 34s ==\n" "$canister"
-             set -x
-             dfx-canister-url --network "$DFX_NETWORK" "$canister"
-             dfx canister info --network "$DFX_NETWORK" "$canister"
-             dfx canister metadata --network "$DFX_NETWORK" "$canister" git_commit_id
-             set +x
+            {
+              printf "## %s\n\n" "$canister"
+              printf "URL:    "
+              dfx-canister-url --network "$DFX_NETWORK" "$canister"
+              printf "Commit: "
+              dfx canister metadata --network "$DFX_NETWORK" "$canister" git_commit_id || printf "NONE"
+              echo
+              dfx canister info --network "$DFX_NETWORK" "$canister"
+              echo
+            } >> $GITHUB_STEP_SUMMARY || true
           done