Update docker files to develop in non-native env

docker/Dockerfile

@@ -1,35 +1,29 @@
-FROM debian:buster
-
-WORKDIR /explain
-
-ENV DEBIAN_FRONTEND=noninteractive
-RUN apt-get update && \
-    apt-get install -y libmojolicious-perl \
-                libemail-sender-perl \
-                libdate-simple-perl \
-                libemail-valid-perl \
-                libxml-simple-perl  \
-                libdbd-pg-perl \
-                libmodule-build-perl \
-                libyaml-perl \
-                libjson-perl \
-                libclone-perl \
-                libtest-deep-perl \
-                libtest-exception-perl \
-                libnumber-bytes-human-perl \
-                pgformatter \
-                curl \
-                build-essential
-
-RUN curl -L cpanmin.us | perl - -n Mojolicious
-
-RUN cpan install Pg::Explain
-COPY lib/ ./lib/
-COPY ext/ ./ext/
-RUN sed -i s/Mail::Sender/Email::Sender/g lib/Explain/Plugin/MailSender.pm
-COPY docker/explain.json explain.pl ./
-COPY layout/ /layout/
-COPY public/ ./public/
-COPY templates/ ./templates
-
-ENTRYPOINT ./explain.pl daemon
+FROM debian:buster
+
+WORKDIR /explain
+
+ENV DEBIAN_FRONTEND=noninteractive
+RUN apt-get update && \
+    apt-get install -y libmojolicious-perl \
+                libemail-sender-perl \
+                libdate-simple-perl \
+                libemail-valid-perl \
+                libxml-simple-perl  \
+                libdbd-pg-perl \
+                libmodule-build-perl \
+                libyaml-perl \
+                libjson-perl \
+                libclone-perl \
+                libtest-deep-perl \
+                libtest-exception-perl \
+                libnumber-bytes-human-perl \
+                pgformatter \
+                curl \
+                build-essential
+
+RUN curl -L cpanmin.us | perl - -n Mojolicious
+
+RUN cpan install Pg::Explain
+COPY docker/explain.json explain.pl ./
+
+ENTRYPOINT /explain/explain.pl daemon

docker/docker-compose.yml

@@ -1,18 +1,26 @@
-version: '3'
-services:
-  web:
-    build:
-      context: ..
-      dockerfile: docker/Dockerfile
-    ports:
-     - "3000:3000"
-    depends_on:
-      - "db"
-  db:
-    image: "postgres:11.4"
-    environment:
-      POSTGRES_USER: explaind
-      POSTGRES_PASSWORD: explain
-      POSTGRES_DB: explain
-    volumes:
-      - ../sql:/docker-entrypoint-initdb.d
+version: '3'
+services:
+  web:
+    build:
+      context: ..
+      dockerfile: docker/Dockerfile
+    ports:
+     - "3000:3000"
+    depends_on:
+      - "db"
+    volumes:
+      # volumes instead of copying files. Don't use .. directly because we 
+      # have to override explain.json
+      - ../lib:/explain/lib
+      - ../public:/explain/public
+      - ../layout:/explain/layout
+      - ../ext:/explain/ext
+      - ../templates:/explain/templates
+  db:
+    image: "postgres:11.4"
+    environment:
+      POSTGRES_USER: depesz_explain
+      POSTGRES_PASSWORD: depesz_explain
+      POSTGRES_DB: depesz_explain
+    volumes:
+      - ../sql:/docker-entrypoint-initdb.d