Add libpostal service

The Pelias API has now been modified to expect libpostal to live as a
separate HTTP service rather than being included in memory.

docker-compose.yml

@@ -22,7 +22,7 @@ services:
     volumes:
       - "./pelias.json:/code/pelias.json"
   api:
-    depends_on: [ "baseimage", "libpostal_baseimage" ]
+    depends_on: [ "baseimage" ]
     image: pelias/api
     container_name: pelias_api
     restart: always
@@ -31,7 +31,12 @@ services:
     networks: [ "pelias" ]
     volumes:
       - "./pelias.json:/code/pelias.json"
-      - "libpostaldata:/usr/share/libpostal"
+  libpostal:
+    image: pelias/go-whosonfirst-libpostal
+    container_name: pelias_libpostal
+    restart: always
+    ports: [ "8080:8080" ]
+    networks: [ "pelias" ]
   placeholder:
     depends_on: [ "baseimage" ]
     image: pelias/placeholder

pelias.json

@@ -23,6 +23,9 @@
       "placeholder": {
         "url": "http://placeholder:4100"
       },
+      "libpostal": {
+        "url": "http://libpostal:8080"
+      },
       "pip": {
         "url": "http://pip-service:4200"
       },