fix: Remove Alpine Linux dependencies to resolve CI/CD build failures

- Replace node:20-alpine with node:20 for frontend service
- Replace amazoncorretto:20-alpine with amazoncorretto:20 for all backend services
- Fix user creation commands for standard base images (groupadd/useradd vs addgroup/adduser)
- Install required system packages (shadow-utils, curl) via yum for Amazon Corretto
- Remove invalid npm timeout config option for Node.js compatibility
- Remove problematic curl installation after user switch in frontend

Fixes permission errors, package compatibility issues, and Alpine-specific build failures.
All builds tested and validated locally before commit.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: kenahrens

backend/accounts-service/Dockerfile

@@ -14,14 +14,15 @@ COPY src ./src
 RUN mvn clean package -DskipTests
 
 # Runtime image
-FROM amazoncorretto:20-alpine
+FROM amazoncorretto:20
 
 WORKDIR /app
 
-# Install curl for health checks and create non-root user
-RUN apk add --no-cache curl && \
-    addgroup -g 1001 -S appuser && \
-    adduser -S appuser -u 1001
+# Install necessary tools and create non-root user
+RUN yum update -y && \
+    yum install -y shadow-utils curl && \
+    groupadd -g 1001 appuser && \
+    useradd -u 1001 -g appuser -s /bin/bash appuser
 
 # Copy the built JAR file
 COPY --from=builder /app/target/accounts-service-*.jar app.jar

backend/api-gateway/Dockerfile

@@ -14,14 +14,15 @@ COPY src ./src
 RUN mvn clean package -DskipTests
 
 # Runtime image
-FROM amazoncorretto:20-alpine
+FROM amazoncorretto:20
 
 WORKDIR /app
 
-# Install curl for health checks and create non-root user
-RUN apk add --no-cache curl && \
-    addgroup -g 1001 -S appuser && \
-    adduser -S appuser -u 1001 -G appuser
+# Install necessary tools and create non-root user
+RUN yum update -y && \
+    yum install -y shadow-utils curl && \
+    groupadd -g 1001 appuser && \
+    useradd -u 1001 -g appuser -s /bin/bash appuser
 
 # Copy the built JAR file
 COPY --from=builder /app/target/api-gateway-*.jar app.jar

backend/transactions-service/Dockerfile

@@ -14,14 +14,15 @@ COPY src ./src
 RUN mvn clean package -DskipTests
 
 # Runtime image
-FROM amazoncorretto:20-alpine
+FROM amazoncorretto:20
 
 WORKDIR /app
 
-# Install curl for health checks and create non-root user
-RUN apk add --no-cache curl && \
-    addgroup -g 1001 -S appuser && \
-    adduser -S appuser -u 1001
+# Install necessary tools and create non-root user
+RUN yum update -y && \
+    yum install -y shadow-utils curl && \
+    groupadd -g 1001 appuser && \
+    useradd -u 1001 -g appuser -s /bin/bash appuser
 
 # Copy the built JAR file
 COPY --from=builder /app/target/transactions-service-*.jar app.jar

backend/user-service/Dockerfile

@@ -14,14 +14,15 @@ COPY src ./src
 RUN mvn clean package -DskipTests
 
 # Runtime image
-FROM amazoncorretto:20-alpine
+FROM amazoncorretto:20
 
 WORKDIR /app
 
-# Install curl for health checks and create non-root user
-RUN apk add --no-cache curl && \
-    addgroup -g 1001 -S appuser && \
-    adduser -S appuser -u 1001
+# Install necessary tools and create non-root user
+RUN yum update -y && \
+    yum install -y shadow-utils curl && \
+    groupadd -g 1001 appuser && \
+    useradd -u 1001 -g appuser -s /bin/bash appuser
 
 # Copy the built JAR file
 COPY --from=builder /app/target/user-service-*.jar app.jar

frontend/Dockerfile

@@ -1,18 +1,16 @@
 # Multi-stage build for Next.js frontend
-FROM node:20-alpine AS builder
+FROM node:20 AS builder
 
 WORKDIR /app
 
-# Install curl for debugging and update npm to latest version
-RUN apk add --no-cache curl && \
-    npm install -g npm@latest
+# Update npm to latest version
+RUN npm install -g npm@latest
 
 # Copy package files  
 COPY package.json package-lock.json ./
 
 # Install dependencies with npm ci for faster, reliable installs
 RUN npm config set registry https://registry.npmjs.org/ && \
-    npm config set timeout 60000 && \
     npm config set fetch-retries 3 && \
     npm ci --no-audit --loglevel error
 
@@ -23,13 +21,13 @@ COPY . .
 RUN npm run build
 
 # Runtime image
-FROM node:20-alpine
+FROM node:20
 
 WORKDIR /app
 
-# Create non-root user (Alpine syntax)
-RUN addgroup -g 1001 nodejs && \
-    adduser -u 1001 -G nodejs -s /bin/sh -D nextjs
+# Create non-root user
+RUN groupadd -g 1001 nodejs && \
+    useradd -u 1001 -g nodejs -s /bin/bash nextjs
 
 # Copy built application
 COPY --from=builder /app/public ./public
@@ -45,8 +43,7 @@ USER nextjs
 # Expose port
 EXPOSE 3000
 
-# Health check (using curl which is available in Alpine)
-RUN apk add --no-cache curl
+# Health check
 HEALTHCHECK --interval=30s --timeout=10s --start-period=30s --retries=3 \
     CMD curl -f http://localhost:3000 || exit 1