Added kafka and springBoot roles, minor cleanup, and use ansible-vault to hide sensitive data

ansible/roles/kafka/meta/main.yaml

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+---
+dependencies:
+  - role: docker

ansible/roles/kafka/tasks/main.yaml

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+---
+- name: Create Kafka directory
+  ansible.builtin.file:
+    state: directory
+    path: /opt/kafka
+    owner: root
+    group: root
+    mode: "755"
+- name: Copy docker compose file for kafka
+  ansible.builtin.template:
+    src: opt/kafka/docker-compose.yaml.j2
+    dest: /opt/kafka/docker-compose.yaml
+    owner: root
+    group: root
+    mode: "644"
+    lstrip_blocks: true
+- name: Create Kafka network
+  community.docker.docker_network:
+    name: kafka
+    state: present
+    appends: true
+- name: Start kafka docker container
+  community.docker.docker_compose:
+    project_src: /opt/kafka

ansible/roles/kafka/templates/opt/kafka/docker-compose.yaml.j2

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+version: '2'
+services:
+  zookeeper:
+    image: confluentinc/cp-zookeeper:latest
+    restart: always
+    environment:
+      ZOOKEEPER_CLIENT_PORT: 2181
+      ZOOKEEPER_TICK_TIME: 2000
+    expose:
+      - "2181"
+    networks:
+      - kafka
+
+  kafka:
+    image: confluentinc/cp-kafka:latest
+    depends_on:
+      - zookeeper
+    expose:
+      - "9092"
+    networks:
+      - kafka
+    restart: always
+    environment:
+      KAFKA_BROKER_ID: 1
+      KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181
+      KAFKA_LISTENERS: PLAINTEXT://kafka:9092
+      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka:9092
+      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT
+      KAFKA_INTER_BROKER_LISTENER_NAME: PLAINTEXT
+      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
+
+  kafkacat:
+    image: confluentinc/cp-kafkacat:7.0.10
+    command: sleep infinity
+    networks:
+      - kafka
+
+networks:
+  kafka:
+    name: kafka
+    external: true