No connection possible as client

[Do1SKL]

Hello

I don't know why, but I can't establish a connection to TrackDirect. Does TrackDirect include an APRSC server, or do I have to install it myself? I've already installed APRSC as a secondary component and established a connection from TrackDirect to APRSC via APRSIS. As I understand it, an APRSC server should be installed via Docker, and the connection between TrackDirect and APRSC should then work. What am I doing wrong? I have a feeling that Docker isn't installing the APRSC server correctly.

FROM ubuntu:24.04

RUN apt-get update && apt-get install -y
gnupg
&& rm -rf /var/lib/apt/lists/*

RUN printf "deb [trusted=yes] http://aprsc-dist.he.fi/aprsc/apt noble main" >> /etc/apt/sources.list
RUN gpg --keyserver keyserver.ubuntu.com --recv C51AA22389B5B74C3896EF3CA72A581E657A2B8D
RUN gpg --export C51AA22389B5B74C3896EF3CA72A581E657A2B8D | apt-key add -

RUN apt-get update && apt-get install -y
aprsc
&& rm -rf /var/lib/apt/lists/*

EXPOSE 10152
EXPOSE 14580
EXPOSE 10155
EXPOSE 14501

WORKDIR /opt/aprsc
USER aprsc

COPY config/aprsc.conf /opt/aprsc/etc/aprsc.conf
CMD /opt/aprsc/sbin/aprsc -c /opt/aprsc/etc/aprsc.conf

The question is, do I need to install aprsc additionally, or do I only need TrackDirect via Docker? But how can the client connect to TrackDirect?