fix workdir on 1.5.4

Dockerfile

@@ -1,5 +1,5 @@
 # Inherit from the main guacamole official image
-FROM guacamole/guacamole:1.5.5
+FROM guacamole/guacamole:1.5.4
 
 # Make directories to support adding in jars
 USER root
@@ -9,21 +9,22 @@ RUN mkdir -p /tmp
 WORKDIR /tmp
 
 # Download jar that supports saml (Azure Entra ID)
-RUN curl -O https://archive.apache.org/dist/guacamole/1.5.5/binary/guacamole-auth-sso-1.5.5.tar.gz
-RUN tar -xvzf /tmp/guacamole-auth-sso-1.5.5.tar.gz
-RUN cp /tmp/guacamole-auth-sso-1.5.5/saml/guacamole-auth-sso-saml-1.5.5.jar /opt/guacamole/extensions/
+RUN curl -O https://archive.apache.org/dist/guacamole/1.5.4/binary/guacamole-auth-sso-1.5.4.tar.gz
+RUN tar -xvzf /tmp/guacamole-auth-sso-1.5.4.tar.gz
+RUN cp /tmp/guacamole-auth-sso-1.5.4/saml/guacamole-auth-sso-saml-1.5.4.jar /opt/guacamole/extensions/
 
 # Download jar that supports DB (postgres) authentication
-RUN curl -O https://archive.apache.org/dist/guacamole/1.5.5/binary/guacamole-auth-jdbc-1.5.5.tar.gz
-RUN tar -xvzf /tmp/guacamole-auth-jdbc-1.5.5.tar.gz
-RUN cp /tmp/guacamole-auth-jdbc-1.5.5/postgresql/guacamole-auth-jdbc-postgresql-1.5.5.jar /opt/guacamole/extensions/
+RUN curl -O https://archive.apache.org/dist/guacamole/1.5.4/binary/guacamole-auth-jdbc-1.5.4.tar.gz
+RUN tar -xvzf /tmp/guacamole-auth-jdbc-1.5.4.tar.gz
+RUN cp /tmp/guacamole-auth-jdbc-1.5.4/postgresql/guacamole-auth-jdbc-postgresql-1.5.4.jar /opt/guacamole/extensions/
 
 # Download jar that supports DB (postgres)
 RUN curl -O https://jdbc.postgresql.org/download/postgresql-42.6.2.jar
 RUN cp /tmp/postgresql-42.6.2.jar /opt/guacamole/lib/
 RUN rm -rf /tmp/*
 
 # Now last 3 lines from the official image that actually start the guacamole service
+WORKDIR /opt/guacamole
 USER guacamole
 EXPOSE 8080
 CMD ["/opt/guacamole/bin/start.sh"]