fix: update Dockerfile to use Alpine base image and add cleanup script for droplet management

orchestrator/Dockerfile

@@ -1,12 +1,8 @@
-FROM catthehacker/ubuntu:runner-22.04
-USER root
-RUN apt-get update && apt-get install -y curl bash git wget openssh-client
-
-RUN wget https://github.com/digitalocean/doctl/releases/download/v1.141.0/doctl-1.141.0-linux-amd64.tar.gz \
-    && tar -xvf doctl-1.141.0-linux-amd64.tar.gz \
-    && mv doctl /usr/local/bin \
-    && rm doctl-1.141.0-linux-amd64.tar.gz
+FROM alpine:latest
+RUN apk add --no-cache curl bash git doctl openssh
 
 COPY orchestrating.sh /usr/local/bin/orchestrating
 COPY cleanup.sh /usr/local/bin/cleanup
 RUN chmod 755 /usr/local/bin/orchestrating /usr/local/bin/cleanup
+
+RUN mkdir -p /var/run/act/

orchestrator/cleanup.sh

@@ -0,0 +1,53 @@
+#!/bin/bash
+
+# Function to check list of required environment variables
+check_env_vars() {
+    local missing_vars=()
+    for var in "$@"; do
+        if [ -z "${!var}" ]; then
+            missing_vars+=("$var")
+        fi
+    done
+    if [ ${#missing_vars[@]} -ne 0 ]; then
+        echo "Error: The following environment variables are not set: ${missing_vars[*]}"
+        exit 1
+    fi
+}
+
+# Function to check if doctl is available
+check_doctl() {
+    if ! command -v doctl &> /dev/null; then
+        echo "Error: doctl is not installed or not in PATH"
+        echo "Please install doctl: https://docs.digitalocean.com/reference/doctl/how-to/install/"
+        exit 1
+    fi
+}
+
+# Function to destroy droplet using environment variable
+cleanup_droplet() {
+    # Get droplet ID from environment variable
+    local droplet_id="$DROPLET_ID"
+
+    echo "Destroying droplet with ID: $droplet_id"
+
+    # Authenticate doctl
+    doctl auth init --access-token "$DO_TOKEN"
+
+    # Destroy droplet
+    if doctl compute droplet delete "$droplet_id" --force; then
+        echo "Droplet $droplet_id destroyed successfully"
+        return 0
+    else
+        echo "Error: Failed to destroy droplet $droplet_id"
+        return 1
+    fi
+}
+
+# Check required environment variables
+check_env_vars "DROPLET_ID" "DO_TOKEN"
+
+# Check if doctl is available
+check_doctl
+
+# Execute cleanup
+cleanup_droplet