fix docker build

Author: stefanspiska

.gitattributes

@@ -42,6 +42,7 @@ gradlew    text eol=lf
 *.scm      text
 *.scss     text
 *.sh       text eol=lf
+Dockerfile text eol=lf
 *.sql      text
 *.styl     text
 *.tag      text

Dockerfile

@@ -51,6 +51,7 @@ COPY ./rest-ehr-scape/pom.xml ./rest-ehr-scape/pom.xml
 COPY ./rest-openehr/pom.xml ./rest-openehr/pom.xml
 COPY ./service/pom.xml ./service/pom.xml
 COPY ./test-coverage/pom.xml ./test-coverage/pom.xml
+COPY ./plugin/pom.xml ./plugin/pom.xml
 RUN mvn dependency:go-offline -B
 
 # COPY SOURCEFILES