Add Docker Compose template for SPARQL endpoint and RDF browser. Resolve

 w3c#96.

docker/.env.dist

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+DBA_PASSWORD=changeme

docker/README.md

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+Simple template for a Docker Compose setup with a SPARQL Endpoint and RDF browser for a small knowledge base.
+
+# Run
+
+1. `docker compose up --build`
+2. test the SPARQL endpoint http://localhost:8890/sparql and the RDF browser at http://localhost:8080/
+
+# Adapt
+
+1. replace rdf/example.ttl with your knowledge base
+2. add your namespaces to initdb.d/setup.sql
+3. adapt docker-compose.yml
+4. copy .env.dist to .env and change DBA\_PASSWORD

docker/docker-compose.yml

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+services:
+
+  virtuoso:
+    image: openlink/virtuoso-opensource-7
+    environment:
+      - DBA_PASSWORD=${DBA_PASSWORD}
+      - VIRT_DATABASE_ERRORLOGLEVEL=3
+      - VIRT_SPARQL_DEFAULTGRAPH=http://example.org
+      - VIRT_SPARQL_DEFAULTQUERY=select distinct * {?s ?p ?o.} LIMIT 100
+      - VIRT_PARAMETERS_DIRSALLOWED=., /usr/local/virtuoso-opensource/share/virtuoso/vad, /rdf
+      - VIRT_PLUGINS_-=-
+    volumes:
+      - ./rdf:/rdf:ro
+      - ./initdb.d:/opt/virtuoso-opensource/initdb.d:ro
+    ports:
+      - "127.0.0.1:8890:8890"
+    restart: unless-stopped
+
+  rickview:
+    image: ghcr.io/konradhoeffner/rickview:master
+    environment:
+      - RICKVIEW_KB_FILE=/rdf/example.ttl
+      - RICKVIEW_TITLE=Example Title
+      - RICKVIEW_SUBTITLE=Example Subtitle
+      - RICKVIEW_PREFIX=ex
+      - RICKVIEW_NAMESPACE=http://example.org/
+      - RICKVIEW_EXAMPLES=ExClass ExProperty ExInstance
+    volumes:
+      - ./rdf:/rdf:ro
+    ports:
+      - "127.0.0.1:8080:8080"
+    restart: unless-stopped
+
+volumes:
+  rdf:

docker/initdb.d/setup.sql

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+log_message('Setup: Activate CORS');
+update DB.DBA.HTTP_PATH set HP_OPTIONS = serialize(vector('browse_sheet', '', 'noinherit', 'yes', 'cors', '*', 'cors_restricted', 0))  where HP_LPATH = '/sparql';
+log_message('Setup: Declare namespaces');
+DB.DBA.XML_SET_NS_DECL ('ex', 'http://example.org/', 2);
+log_message('Setup: Load data');
+ld_dir_all ('/rdf/', '*.ttl', 'http://example.org');
+rdf_loader_run();
+log_message('Setup: Finished');
+

docker/rdf/example.ttl

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+@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>.
+@prefix owl: <http://www.w3.org/2002/07/owl#>.
+@prefix ex: <http://example.org/>.
+
+ex:ExClass
+  a owl:Class;
+  rdfs:comment "an example class"@en;
+  rdfs:label "example class"@en.
+
+ex:ExInstance
+  ex:exProperty 5;
+  a ex:ExClass;
+  rdfs:comment "an example instance."@en;
+  rdfs:label "example instance"@en.
+
+ex:exProperty
+  a owl:DatatypeProperty;
+  rdfs:domain ex:ExClass;
+  rdfs:label "Beispielproperty"@de, "example property"@en.