fix: add gas price arg if BTP_GAS_PRICE is set (#3)

1. Sets the gas-price in the CLI if the env is set
2. Fixed the GHA error: 

```bash
docker exporter does not currently support exporting manifest lists
```

Currently we can't load multi arch images in the docker store
(docker/build-push-action#733 (comment),
old issue, but ref: docker/buildx#59, there
are still issues); so we don't load the output and always push it

Author: snigdha920

.github/workflows/branch.yml

@@ -102,8 +102,9 @@ jobs:
       - name: Build and push
         uses: docker/build-push-action@v5
         with:
+          load: false
+          push: true
           platforms: linux/amd64,linux/arm64
-          push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
           no-cache: true

Makefile

@@ -29,11 +29,17 @@ deploy-anvil:
 deploy:
 	@eval $$(curl -H "x-auth-token: $${BPT_SERVICE_TOKEN}" -s $${BTP_CLUSTER_MANAGER_URL}/ide/foundry/$${BTP_SCS_ID}/env | sed 's/^/export /')
 	@if [ -z "${ETH_FROM}" ]; then \
-		echo "\033[1;33mWARNING: No keys are activated on the node, falling back to interactive mode...\033[0m"; \
-		echo ""; \
-		forge create ./src/Counter.sol:Counter ${EXTRA_ARGS} --rpc-url ${BTP_RPC_URL} --interactive | tee deployment.txt; \
+		if [ -z "${BTP_GAS_PRICE}" ]; then \
+			forge create ./src/Counter.sol:Counter ${EXTRA_ARGS} --rpc-url ${BTP_RPC_URL} --interactive | tee deployment.txt; \
+		else \
+			forge create ./src/Counter.sol:Counter ${EXTRA_ARGS} --rpc-url ${BTP_RPC_URL} --interactive --gas-price ${BTP_GAS_PRICE} | tee deployment.txt; \
+		fi; \
 	else \
-		forge create ./src/Counter.sol:Counter ${EXTRA_ARGS} --rpc-url ${BTP_RPC_URL} --unlocked | tee deployment.txt; \
+		if [ -z "${BTP_GAS_PRICE}" ]; then \
+			forge create ./src/Counter.sol:Counter ${EXTRA_ARGS} --rpc-url ${BTP_RPC_URL} --unlocked | tee deployment.txt; \
+		else \
+			forge create ./src/Counter.sol:Counter ${EXTRA_ARGS} --rpc-url ${BTP_RPC_URL} --unlocked --gas-price ${BTP_GAS_PRICE} | tee deployment.txt; \
+		fi; \
 	fi
 
 script-anvil: