Create container to run the web service

The container is based on the usgs/geomag-algorithms:latest image.

docker-compose.yml

+version: "3"
+services:
+  web:
+    image: usgs/geomag-algorithms:latest
+    environment:
+      - EDGE_HOST=cwbpub.cr.usgs.gov
+      - EDGE_PORT=2060
+      - GEOMAG_WEBSERVICE_PORT=8000
+      - VERSION=0.3.1
+    ports:
+      - "8000:8000"
+    entrypoint: /geomag-algorithms/bin/geomag_webservice.py

geomagio/WebService.py

@@ -77,11 +77,7 @@ class WebService(object):
     def __init__(self, factory=None, metadata=None):
         self.factory = factory or EdgeFactory()
         self.metadata = metadata or ObservatoryMetadata().metadata
-        base = os.path.dirname(__file__)
-        filepath = os.path.abspath(os.path.join(base, '..', 'package.json'))
-        with open(filepath) as package:
-            specifications = load(package)
-        self.version = specifications['version']
+        self.version = os.getenv('VERSION', None)
 
     def __call__(self, environ, start_response):
         """Implement WSGI interface"""
@@ -185,9 +181,10 @@ class WebService(object):
                 'Request:\n' + \
                 environ['PATH_INFO'] + '?' + environ['QUERY_STRING'] + \
                 '\n\n' + 'Request Submitted:\n' + \
-                datetime.utcnow().strftime("%Y-%m-%dT%H:%M:%SZ") + '\n\n' + \
-                'Service version:\n' + \
-                str(self.version)
+                datetime.utcnow().strftime("%Y-%m-%dT%H:%M:%SZ") + '\n\n'
+        # Check if there is version information available
+        if self.version is not None:
+            http_error_body += 'Service version:\n' + str(self.version)
         return http_error_body
 
     def parse(self, params):