might work

Dockerfile

@@ -18,7 +18,7 @@ RUN mkdir /var/lib/dav/
 RUN chown deploy:deploy /var/lib/dav/
 
 # apache should run as user deploy
-RUN sed -i .bak -r 's/(User|Group) apache/\1 deploy/' /etc/apache2/httpd.conf
+RUN sed -i.bak -r 's/(User|Group) apache/\1 deploy/' /etc/apache2/httpd.conf
 
 RUN openrc
 RUN touch /run/openrc/softlevel

dav_svn.conf

@@ -1,19 +1,17 @@
 LoadModule dav_svn_module /usr/lib/apache2/mod_dav_svn.so
 LoadModule authz_svn_module /usr/lib/apache2/mod_authz_svn.so
 
-<VirtualHost 127.0.0.1:8000>
-    <Location />
-        DAV svn
-        SVNParentPath /data
-        SVNListParentPath On
+<Location />
+    DAV svn
+    SVNParentPath /data
+    SVNListParentPath On
 
-        SVNAutoversioning on
-        ModMimeUsePathInfo on
+    SVNAutoversioning on
+    ModMimeUsePathInfo on
 
-        AuthType Basic
-        AuthName "svn"
-        AuthUserFile /data/.htpasswd
-        AuthzSVNAccessFile /data/authz
-        Require valid-user
-    </Location>
-</VirtualHost>
+    AuthType Basic
+    AuthName "svn"
+    AuthUserFile /data/.htpasswd
+    AuthzSVNAccessFile /data/authz
+    Require valid-user
+</Location>