add neo4j (#554)

* add neo4j

* prettier: fix formatting

public/v4/apps/neo4j.yml

@@ -0,0 +1,35 @@
+captainVersion: 4
+services:
+    $$cap_appname-db:
+        image: neo4j:$$cap_neo4j_version
+        volumes:
+            - $$cap_appname-db-data:/data
+        restart: unless-stopped
+        environment:
+            NEO4J_AUTH: $$cap_db_user/$$cap_db_pass
+        caproverExtra:
+            notExposeAsWebApp: 'true'
+caproverOneClickApp:
+    variables:
+        - id: $$cap_neo4j_version
+          label: Neo4j Version
+          defaultValue: '4.1.9'
+          description: Check out their Docker page for the valid tags https://hub.docker.com/_/neo4j?tab=tags
+          validRegex: /^([^\s^\/])+$/
+        - id: $$cap_db_user
+          label: Neo4j Root User
+          defaultValue: neo4j
+          description: Username for the database user
+          validRegex: /^([a-zA-Z0-9_])+$/
+        - id: $$cap_db_pass
+          label: Neo4j Root password
+          defaultValue: $$cap_gen_random_hex(10)
+          description: Password for the database user
+          validRegex: /.{1,}/
+    instructions:
+        start: Neo4j is an open-source, NoSQL, native graph database that provides an ACID-compliant transactional backend for your applications. Enter your configuration parameters and click on next.
+        end: Neo4j is deployed and available as srv-captain--$$cap_appname-db:7687 for Bolt and srv-captain--$$cap_appname-db:7474 for HTTP connections.
+    displayName: Neo4j
+    isOfficial: true
+    description: Neo4j is an open-source, NoSQL, native graph database that provides an ACID-compliant transactional backend for your applications.
+    documentation: Taken from https://hub.docker.com/_/neo4j