Rename dev_env to rinkeby_env, added make commands description to readme

dockerfiles/rinkeby/Dockerfile

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+FROM golang:1.10.3-alpine3.7
+
+RUN apk add --no-cache make gcc musl-dev
+
+ADD . /go/src/github.com/vulcanize/vulcanizedb
+WORKDIR /go/src/github.com/vulcanize/vulcanizedb
+RUN go build -o /app main.go
+
+ENTRYPOINT ["/app"]

dockerfiles/rinkeby/config.toml

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+[database]
+name = "vulcanizedb"
+hostname = "postgres"
+port = 5432
+user = "postgres"
+password = "postgres"
+
+[client]
+ipcPath = "/geth/geth.ipc"

dockerfiles/rinkeby/docker-compose.yml

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+version: '2.2'
+
+services:
+
+  vulcanizedb:
+    build:
+      context: ./../../
+      dockerfile: dockerfiles/rinkeby/Dockerfile
+    container_name: rinkeby_vulcanizedb
+    command: "sync --starting-block-number 0 --config /config.toml"
+    volumes:
+      - "./config.toml:/config.toml"
+      - "vulcanizedb_geth_data:/geth"
+    networks:
+      vulcanizedb_net:
+
+  migrations:
+    image: migrate/migrate:v3.3.0
+    container_name: rinkeby_vulcanizedb_migrations
+    depends_on:
+      postgres:
+        condition: service_healthy
+    command: -database postgresql://postgres:postgres@postgres:5432/vulcanizedb?sslmode=disable -path /migrations up
+    volumes:
+      - ./../../db/migrations:/migrations
+    networks:
+      vulcanizedb_net:
+
+  postgres:
+    image: postgres:9.6.5-alpine
+    container_name: rinkeby_vulcanizedb_postgres
+    environment:
+      POSTGRES_USER: postgres
+      POSTGRES_DB: vulcanizedb
+      POSTGRES_PASSWORD: postgres
+    networks:
+      vulcanizedb_net:
+    healthcheck:
+      test: ["CMD", "pg_isready"]
+      interval: 5s
+      timeout: 5s
+      retries: 30
+  
+  geth:
+    image: ethereum/client-go:v1.8.11
+    container_name: rinkeby_vulcanizedb_geth
+    cpus: 0.3
+    hostname: eth
+    command: '--rinkeby --rpc --rpcaddr="0.0.0.0" --rpcvhosts="geth"'
+    volumes:
+      - "vulcanizedb_geth_data:/root/.ethereum/rinkeby"
+    networks:
+      vulcanizedb_net:
+
+volumes:
+  vulcanizedb_geth_data:
+
+networks:
+  vulcanizedb_net:
+    driver: bridge