build(docker): update environment for GTFS support

Adds JWT_SECRET environment variable and ensures the new
gtfs package is included in the build context.

Author: Gitkbc

Dockerfile

@@ -1,9 +1,10 @@
-FROM golang:1.24-alpine AS build
+FROM golang:1.25-alpine AS build
 WORKDIR /src
 COPY go.mod go.sum ./
 RUN go mod download
 COPY migrations ./migrations 
 COPY db ./db
+COPY gtfs ./gtfs
 COPY *.go ./
 RUN CGO_ENABLED=0 go build -o /vehicle-positions .
 

docker-compose.yml

@@ -23,6 +23,7 @@ services:
       PORT: "8080"
       DATABASE_URL: "postgres://postgres:postgres@db:5432/vehicle_positions?sslmode=disable"
       STALENESS_THRESHOLD: "5m"
+      JWT_SECRET: "this-is-a-local-dev-secret-1234567890"
     depends_on:
       db:
         condition: service_healthy