Fix Docker build

.dockerignore

@@ -0,0 +1,3 @@
+.stack-work/
+replays/
+tools/

Dockerfile

@@ -1,11 +1,11 @@
-FROM alpine:3.8 AS build
+FROM alpine:3.9.4 AS build
 RUN apk add --no-cache cabal ghc gmp-dev musl-dev wget zlib-dev
 RUN cabal update
 WORKDIR /root/rattletrap
 COPY . .
 RUN cabal new-build --flags static
 RUN cp $( cabal new-exec which rattletrap | tail -n 1 ) /usr/local/bin/
 
-FROM alpine:3.8
+FROM alpine:3.9.4
 COPY --from=build /usr/local/bin/rattletrap /usr/local/bin/rattletrap
 CMD rattletrap

rattletrap.cabal

@@ -1,4 +1,4 @@
-cabal-version: 2.4
+cabal-version: 2.2
 
 name: rattletrap
 version: 7.0.0
@@ -23,7 +23,7 @@ common basics
   build-depends:
     aeson ^>= 1.4.2,
     aeson-pretty ^>= 0.8.7,
-    base ^>= 4.12.0,
+    base >= 4.11.1 && < 4.13,
     binary ^>= 0.8.6,
     binary-bits ^>= 0.5,
     bytestring ^>= 0.10.8,
@@ -32,7 +32,7 @@ common basics
     http-client ^>= 0.5.14,
     http-client-tls ^>= 0.3.5,
     scientific ^>= 0.3.6,
-    template-haskell ^>= 2.14.0,
+    template-haskell >= 2.13.0 && < 2.15,
     text ^>= 1.2.3,
     transformers ^>= 0.5.6,
   default-language: Haskell2010