Add Dockerfile and sample docker-compose.yml

Dockerfile

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+FROM openjdk:17-jdk as builder
+MAINTAINER William Brawner <me@wbrawner.com>
+
+RUN microdnf install findutils
+
+RUN groupadd --system --gid 1000 gradle \
+    && useradd --system --gid gradle --uid 1000 --shell /bin/bash --create-home gradle
+
+COPY --chown=gradle:gradle . /home/gradle/src
+WORKDIR /home/gradle/src
+RUN /home/gradle/src/gradlew --console=plain --no-daemon shadowJar
+
+FROM openjdk:17-slim
+EXPOSE 8080
+RUN groupadd --system --gid 1000 civicsbot \
+    && useradd --system --gid civicsbot --uid 1000 --create-home civicsbot
+COPY --from=builder --chown=civicsbot:civicsbot /home/gradle/src/build/libs/civics-quiz-bot.jar civics-quiz-bot.jar
+USER civicsbot
+CMD /usr/local/openjdk-17/bin/java $JVM_ARGS -jar /civics-quiz-bot.jar

docker-compose.yml

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+version: "3.3"
+
+services:
+  bot:
+    build: .
+    ports:
+      - "8080:8080"
+    environment:
+      - CIVICS_DB_HOST=db
+    networks:
+      - civics
+    hostname: bot
+
+  db:
+    image: postgres:14
+    ports:
+      - "5432:5432"
+    environment:
+      POSTGRES_DB: postgres
+      POSTGRES_USER: postgres
+      POSTGRES_PASSWORD: postgres
+    networks:
+      - civics
+    hostname: db
+
+networks:
+  civics: