Optimize Docker build files

.dockerignore

@@ -0,0 +1,15 @@
+/.git/
+/.github/
+/.idea/
+/docs/
+/logs/
+/scripts/
+
+bin/
+obj/
+
+*.conf
+*.md
+
+Dockerfile
+docker-compose.yml

Dockerfile

@@ -1,9 +1,13 @@
-FROM mcr.microsoft.com/dotnet/core/sdk:2.2-alpine
+FROM mcr.microsoft.com/dotnet/core/sdk:2.2-alpine AS build
 
 WORKDIR /app
-COPY PluralKit.API /app/PluralKit.API
-COPY PluralKit.Bot /app/PluralKit.Bot
-COPY PluralKit.Core /app/PluralKit.Core
-COPY PluralKit.Web /app/PluralKit.Web
-COPY PluralKit.sln /app
-RUN dotnet build
+COPY . /app
+RUN dotnet publish -c Release -o out
+
+FROM mcr.microsoft.com/dotnet/core/runtime:2.2-alpine
+WORKDIR /app
+COPY --from=build /app/PluralKit.*/out ./
+
+ENTRYPOINT ["dotnet"]
+CMD ["PluralKit.Bot.dll"]
+

docker-compose.yml

@@ -1,8 +1,9 @@
 version: "3"
 services:
   bot:
-    build: .
-    entrypoint: ["dotnet", "run", "--project", "PluralKit.Bot"]
+    image: pluralkit # This image is reused in the other containers due to the
+    build: .         # build instruction right here
+    command: ["PluralKit.Bot.dll"]
     environment:
       - "PluralKit:Database=Host=db;Username=postgres;Password=postgres;Database=postgres;Maximum Pool Size=1000"
       - "PluralKit:InfluxUrl=http://influx:8086"
@@ -16,8 +17,8 @@ services:
       - influx
     restart: always
   web:
-    build: .
-    entrypoint: ["dotnet", "run", "--project", "PluralKit.Web"]
+    image: pluralkit
+    command: ["PluralKit.Web.dll"]
     environment:
       - "PluralKit:Database=Host=db;Username=postgres;Password=postgres;Database=postgres;Maximum Pool Size=1000"
     links: 
@@ -26,8 +27,8 @@ services:
       - 2837:5000
     restart: always
   api:
-    build: .
-    entrypoint: ["dotnet", "run", "--project", "PluralKit.API"]
+    image: pluralkit
+    command: ["PluralKit.API.dll"]
     environment:
       - "PluralKit:Database=Host=db;Username=postgres;Password=postgres;Database=postgres;Maximum Pool Size=1000"
     links: