Fix casing in Dockerfile

Dockerfile

@@ -6,14 +6,14 @@ ENV NODE_OPTIONS=--openssl-legacy-provider
 # I dont know why, but when doing npm install in this Dockerfile, methone just gets cloned but there
 # is no dist directory, which makes the build fail since there is nothing in methone to import.
 # Also: cd:ing into node_modules/methone and running `npm i && npm run build` doesn't.
-FROM base as methone-builder
+FROM base AS methone-builder
 
 RUN apk add git
 RUN git clone https://github.com/datasektionen/methone .
 RUN npm i
 RUN npm run build
 
-FROM base as builder
+FROM base AS builder
 
 RUN apk add git
 COPY package.json package-lock.json ./