Add OSRM and OTP Docker services with setup scripts

Adds osrm-foot, osrm-bicycle, and otp services to Docker Compose under
a 'routing' profile (opt-in). Setup scripts download Greater London OSM
data and pre-process for OSRM foot/bicycle profiles, plus TfL GTFS for
OTP transit. Routing engine env vars added to .env.sample.

docker-compose.yml

@@ -140,6 +140,45 @@ services:
     networks:
       - rec-network
 
+  osrm-foot:
+    image: ghcr.io/project-osrm/osrm-backend:latest
+    container_name: rec-osrm-foot
+    command: ["osrm-routed", "--algorithm", "MLD", "/data/foot/greater-london-latest.osrm"]
+    volumes:
+      - osrm_data:/data
+    ports:
+      - "5100:5000"
+    networks:
+      - rec-network
+    profiles:
+      - routing
+
+  osrm-bicycle:
+    image: ghcr.io/project-osrm/osrm-backend:latest
+    container_name: rec-osrm-bicycle
+    command: ["osrm-routed", "--algorithm", "MLD", "/data/bicycle/greater-london-latest.osrm"]
+    volumes:
+      - osrm_data:/data
+    ports:
+      - "5101:5000"
+    networks:
+      - rec-network
+    profiles:
+      - routing
+
+  otp:
+    image: opentripplanner/opentripplanner:2.6.0
+    container_name: rec-otp
+    command: ["--load", "--serve"]
+    volumes:
+      - otp_data:/var/opentripplanner
+    ports:
+      - "8080:8080"
+    networks:
+      - rec-network
+    profiles:
+      - routing
+
 networks:
   rec-network:
     driver: bridge
@@ -150,3 +189,5 @@ volumes:
   app_venv:
   frontend_node_modules:
   caddy_data:
+  osrm_data:
+  otp_data: