Fix docker build error (#20)

When using COPY with more than one source file, the destination
must be a directory and end with a /

1 files changed, 3 insertions, 3 deletions

diff --git a/Dockerfile b/Dockerfile
index 37ff07c..3944c64 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,9 +8,9 @@ RUN apk add nodejs npm git; \
 COPY res ./res
 COPY src ./src
 COPY user ./user
-COPY build-*.hxml .
-COPY package*.json .
-COPY default-config.json .
+COPY build-*.hxml ./
+COPY package*.json ./
+COPY default-config.json ./
 
 RUN npm ci; \
     haxelib install all --always; \