diff --git a/src/faaso.cr b/src/faaso.cr
index 7e3b789..cc4d1cd 100644
--- a/src/faaso.cr
+++ b/src/faaso.cr
@@ -1,4 +1,6 @@
 require "commander"
+require "docr"
+require "docr/utils.cr"
 require "file_utils"
 require "uuid"
 
@@ -29,8 +31,9 @@ module Faaso
           Dir.glob(arg + "/**/*").each do |file|
             FileUtils.cp(file, tmp_dir)
           end
-
           # TODO: build Docker image
+          docker_api = Docr::API.new(Docr::Client.new)
+          docker_api.images.build(context: tmp_dir, tags: ["func"]) { }
           # TODO: push Docker image to registry
           # TODO: return image name for testing
         end
diff --git a/templates/crystal/Dockerfile b/templates/crystal/Dockerfile
index 20a8453..44fbefb 100644
--- a/templates/crystal/Dockerfile
+++ b/templates/crystal/Dockerfile
@@ -4,7 +4,7 @@ RUN apk update && apk upgrade && apk add crystal shards openssl-dev zlib-dev &&
 
 WORKDIR /home/app
 
-COPY shard.yml *.cr .
+COPY shard.yml *.cr ./
 RUN shards install
 RUN shards build